Science skills are skills focused around intelligence and wisdom.  Like the nature skills they play a very little, if any role in killing.

Science skills are:
   Languages - how well you are able to learn new languages
   Botany - how well you know plants, their uses, poisons, etc
   Alchemy - how well you know chemicals for potions, etc
   Navigation - how well are you at navigating the seas
   Medicine - how well you know non-magic healing arts
